Paper bag.



C; BL SANDERS.

PAPER BAG. APPLIOATION FILED SEPT. a, 1910.

Patented June 18, 1912.

ffz'zfzzesses; u ffy CHARLES B. SANDERS, OIE' MONTGLIR, NEW JERSEY,ASSIGNUR. .TO UNION PAPER BAG MACHINE COMPANY, OF BHILADEIPHQIIA,PENNSYLVANIA, A CORPORATION or rENNsYLvANm A lnarnia Bae.

- To all whom t may lconcern Be it known that I, CHARLES B. SANDERS, acitizen of the United States, and resident of 'Montclair, in the countyof 'Essexand Stateof New Jersey, -have invented certain new and usefulImprovements in Paper Bags, of which the following is a full', clear,

' more important of which are to enable the inner and outer walls to be`of different strength, thickness, color or penetrability.

For example, some of these bags are made with an-inner wall or lining ofpaper which has been-paraned'or otherwise made more or less waterproofvon alr-proof, either to exclude the air,.or to coninethe flavor or''aroma of the goods to be packed in the bags,

as for example in the case of tea or coffee, or'to prevent the' escapeof ollyor more, or

less liquid constituents of goods contained y within the bag. lIn suchcases, lespecially'v vwhere it' is desirable to print or ornament, -theouter 'sides of the bags', the outer wall or cover is made either ofpaper, which is ornamental 1n deslgn or color, or which is Y ladapted totake ink or other' printing c olor.

bags of this p general type in a form which may-be more convenientlyprinted, folded,

'The presentl invention is intended to make bundled, and4 subsequently`filled than has heretofore been possible, on account of the'` iarrangement and relation of the folds, seams and plies heretoforeemployed in this type of bag'.

The seams of the inner and outer body portions have generall beeninterfolded,

making v a single,` thic composite seam, which not only makesthe'subse'quentprinti. ing of the bag more diliicult, but also makeswhich the ybags' are filled, it being `foundv the bags build up moreunevenly injthickness when stacked in the bundles in .which they arecommonly stored and transported. The composite seam lalso makes` thebody portion of thebag stiier to handle when filling the bag, and alsoprevents free adjustment of the `walls o f the bag to the weight anddisplacement lof the material wlth preferable for ymany purposes toleave the inner wall or lining of 'thebody portion of at or nearthe'center of the-blau Application led September 8, 1910. Serial No.581,010.

the bag entirely free from the outer portion,

so that either portion can slip, relative to the other at all portionsof the body, thus combining their strength to best advantage, withoutweakening or hampering each other.

It is generally desirable to have the outer body seam as nearlyinvisible as possible, so as not to` detract from their externalappearance., especially when finely colored or ornamented paper isemployed, in casethe bags are to be printed. Moreover, in the lattercase, it is desirable to have the outer visible seam as nearly ,aspossible at oneedge of the. side or face of the bag, so as to` enablethe 4bags to be printed on both faces. In cases where the paper isprinted in the sheet or web, before being folded into bags, it isdesirable thus to have the visible o'iter seam as nearly as possible incoincidence with the edge-of the bags in their folded form, lso as toavoid exposing `or 'making prominent any lack of register that mayresult from the folding operation. On the other hand; it is importantalso to adaptthese bags to be manufactured by modern rapid automaticpaper bag making machines, with which itis found sufficientlydiflicultto manufacture the ordinary single ply bags,

` Specification of Letters Patent. Patentdl Jun@ i8, 19h2- Iparticularly those having bellows sldes and square bottoms, known as theS. 0. S, or

improved square types. These machines .must operate very rapidly, inorder to be commercially successful', and withsuch rapidity of operationit becomes importantto. have the paper tubes or blanks `sultably yfoldedand-uniformly balanced in their re-1 sistance to the bottom foldingoperation.

side of the center of the width of the blank, this greater thicknessoffers greater resistance at that/side of the blank, tending to lack ofuniformityor symmetry in the fold- Where the tube or body ,seams are allat one ing. Moreover, the tube or body seam, be`

ing freshly pasted,'is` more liable to be separated by the foldingaction when. thus placed at one side. Therefore, for theforegoingprincipal reasons, it is desirable in the case of a double or linedpaper bag, es-

pecially those having the complex bellowssides and bottom folds alludedto, to make thev inner ando-liter body seams separate, and

at- Idifferentlongitudinal positions of the v blank,the inner body seambeing 1preferably outer body seam being at or near theedge of and the ithe blank. It is, however, desirable, to unite and interfold the plieswhich constitute the bottom of the bag, so as to make that bottom asstrong as possible. It is also desir-- opened for filling, the liningwill go with the paste 16, which unites the edges 14 and 15Y adjacentouter portion, thus fully opening the mouth end of the lining withcertainty and rapidity.

The object of the present invention is to produce such a bag.

Figure 1 of the drawings is a side view of the bag of the presentinvention in its flattened form, some of the plies being drawn away andbent over to show more clearly their form and relation. Fig. 2 is anedge view, and Fig. 3 a sectional end view, showing bags like that ofFig. 1 in the reverse relation in which the are stacked, so as to bringthe thickened side fold alternately on opposite sides of the pile orbundle, so that the latter will build up uniformly on its two sides andends. Fig. 4 is a side view of a portion of the bottom of a bag blank inits partly folded condition, illustrating the yrelation of the plies.

In the embodiment shown in the drawings, the outer bag 5 and the innerbag or lining 6 are folded one Within the other in fairly closeconformity, although the plies, especially in Fig. 3, are shown to besomewhat separated as well as magnified in thickness, Vthis being for.the purpose of showing the two plies or thicknesses and their relationmore clearly. The opposite sides of both plies" of each bag are bentforwardly to form the side bellows folds 7, characteristic of this typeof bag. The body seam 8 of the outer bag or blank 5 is located as nearas may be found practicable to one edge 9 of the folded body. In Fig. 1,a por- .tion of the edge 10 of the upper and outer ply is shown to beturned back to show the edge 11 of the inner ply and the line or zone ofpaste 12. Similarly, a' portion of the upper edge 14 ofthe inner-'blankor bag 6 is turned back to show its associated opposite edge 15 and theline or zone of to form the body seam of the innerbag or lining 6. Thespots of paste 18 are for the purpose of uniting the inner bag or lmmgwith its outer bag orv cover at the mouth endof the bag. Thus the outerbag 5 and the inner bag or lining 6 are provided with separateindependent tube or body seams, by means ofthe paste lines 12 and 16,respectively, thus leaving these body portions below the mouth of thebag free to slip relative to each other, as both are expanded by thefilling operation. Although the body portions are thus left separate,with freedom for relative movement, the bottom forming plies of bothbags are interfolded and pastedtogether, as shown in Fig. 4, so as tounite their strength in the formation of a tight and substantial bottom.In this View, various portions of the inner bag 'or lining 6 are turnedback to show that they are folded together in substantial coincidence,being treated as a single ply in the bottom folding operation, andunited by lines or zones 2O of paste. These double bags may bemanufactured by dierent machines well-known in the 'art of making paperbags. A desirable method is to employ separate rolls of paper for theinner and outer bags, drawing them over a tube former, which plaits orfolds the paper con-v tinuously into tubes one within the other,

with bellows sides, as shown in Fig. 3. The leading end of the tube isdrawn by means of suitable drawing rolls into the bottom formingmechanism, which engages the blank either from the outside, in the siderecesses of the bellows folds 7, or in another and well-known type ofmachine, by means of bottom folding fingers 22, which enter the frontend ofthe mouth of the blank, and engage with the inner side of the tubeat those portions thereof which are to become the turned-back corners 23of the bag. In either case the blank is folded to the diamond form shownin Fig. 4. The bot-tom paste 20* is then applied, and the end flaps 24and 25 of the diamond are lfolded in line with the corners 23 and 26,

outer ply of the end flaps 24 and 25, particularly of that flap which isfolded upon the outside, so as to guard against leaving the outermostply of the bottom loose in the completed bag. For this purpose, it isdesirable to apply paste inspots 21, or any other convenient Way,between the inner and outer bags '5 and 6, adjacent to the outer edgesof the ap, as shown in Fig. 4. This can generally be most convenientlydone in connection with the tube forming operation, by devices similarto those which are employed for applying the paste 16 and 18. After thebags are thus completed and dried they are stacked together, as shown inFig. 2, the alternate bags being reversed end for end,l without turningthem 4lover. In this way the body seams 8 of the alternate bags aredisposed at opposite sides of the accumulating pile, while the thickerfolded bottom plies of .the alternate bags are brought to opposite endsof the pile, thus keeping the aggregate thicknesses uniform i in numberon the opposite sidesand ends .of

. soribing the the plle.

The vterm loosely disposed i gisy herein' adopted for conveniencev andbrevity in deloose or unfastened relation between the body portions ofthe inner and outer bags.

I claimas my -invention:-

1. A double paper bag with bellows sides and-a fiat bottom, havingseparate body 'portions Idisposed one -within the other, and havingseparate single body seams, one of Vwhich is disposed at the approximatecenter ofthe width` of the bag, Vand the other`- of which is disposedadjacent to an edge of the bag, the {iaps which form the fiat bottom, ofthe bag consisting Aof the interfolded material oflthe inner and outerbags.

- disposed adjacent 2. A lined paper -bag having the body pox"- tin ofthe lining loosely dlsposedwithn the outer bag, and independently pastedby scparate and independent body seams, one o Whichsis disposed at theapproximate andthe other of which is center of the bag, l

'to the edge ofthev bag,

the flaps forming the flat bottomfof the bag being formed of theinterfolded plies of the bag and its lining.

In testimony name to this specification in the presence of twosubscribing witnesses, this l2nd day of September, 1910. j

- CHARLES B. SANDERS.

Witnesses:

ALLEN E. CsnoR, Y JAS. BoYD Poma.

whereof I have signed my I n.

